The automatics really work good in off road conditions, because you can creep without burning out the clutch. I have been running 30X9.5X15 M&S for a couple years (and many modifications). I found my tires & rims at a 4X4 swap meet, which were in very good condition. They weren't as big as I thought I wanted, but price and condition won me over. My 8v pushed them without many issues, and then then lifts & mods. began. We are running the same size tire on Drone637's race car, with stock rims. Drone637 is running 235X15 on his DD with more of an Hwy/AT tread.
When you start to lift it, 4 door springs will give you about 1"+ (depending on condition/use of springs), and are a straight swap out , giving just a little more clearance for a low price. I feel that the heavier springs produce a better ride than the coil spacers, but it is more experimental than just Ordering a Spacer Kit. Jeff and Mudchild have kits to fix any clearance issues you may develop with either of the tires you questioned about.
